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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: GISList: Recreational GPS units... Where's WAAS? |
| Date: |
09/04/2002 10:06:35 AM |
| From: |
Robert Heitzman |
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http://www.garmin.com/aboutGPS/waas.html
Currently WAAS covers North America only.
WAAS uses ground stations but the correction data they generate is bounced
off satellites back to the ground so coverage concerns are not that
important.
>
>A couple of folks have mentioned that their GPS units are WAAS compatible.
>I
>understand that this means there are secondary corrective transmitters on
>the ground that improve over strictly sattelite-based accuracy -- as good
>as
>a few meters.
>
>My question: where in the USA (or North America) those signals are
>available? I am on the east coast -- are they here?
>
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